What are the x - and y - coordinates of point cap p on the directed line segment from cap A to cap b such that cap p is 1 third the length of the line segment from cap A to cap b ? x is equal to open paren the fraction with numerator m and denominator m plus n close paren times open paren x sub 2 minus x sub 1 close paren plus x sub 1 y is equal to open paren the fraction with numerator m and denominator m plus n close paren times open paren y sub 2 minus y sub 1 close paren plus y sub 1